<template>
    <el-container class="home-container">
<!--      头部区域-->
      <el-header>
        <div>
          <img src="../assets/logo.png">
          <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
      </el-header>
<!--      页面主题-->
      <el-container>
<!--        侧边栏-->
        <el-aside :width="isCollapse ? '64px' : '200px'">
          <div class="toggle-button" @click="toggleCollapse" >
           |||
          </div>
<!--          侧边栏菜单区域-->
          <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF"
                   unique-opened :collapse="isCollapse" :collapse-transition="false" router
          :default-active="activePath">
<!--            一级菜单-->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
<!--            一级菜单的模板区域-->
            <template slot="title">
<!--              图标-->
              <i :class="iconsObj[item.id]"></i>
<!--              文本-->
              <span>{{item.authName}}</span>
            </template>
<!--            二级菜单-->
              <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children"
                            :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                <template slot="title">
<!--                  图标-->
                <i class="el-icon-menu"></i>
<!--                  文本-->
                <span>{{subItem.authName}}</span>
                </template>
              </el-menu-item>
          </el-submenu>
        </el-menu>
        </el-aside>
<!--       右侧内容主体-->
        <el-main>
<!--          路由占位符-->
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        125: 'el-icon-s-custom',
        103: 'el-icon-s-check',
        101: 'el-icon-sell',
        102: 'el-icon-s-claim',
        145: 'el-icon-s-data'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      console.log(res.data)
      // if (res.meta.stauts !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      // console.log(activePath)
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style lang="less" scoped>
  .home-container{
    height: 100%;
  }
 .el-header{
   background-color: #373d41;
   display: flex;
   justify-content: space-between;
   padding-left: 0;
   align-items: center;
   color: white;
   font-size: 20px;
   > div {
     display: flex;
     align-items: center;
     span{
       margin-left: 15px;
     }
   }
}
  .el-aside{
    background-color: #333744;
    .el-menu{
      border-right: none;
    }
  }
  .el-main{
    background-color: white;
  }
  .toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: white;
    text-align: center;
    letter-spacing: 0.2em;
}
</style>
